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The Thrice-Locked Chest Deflects Bast's Axe With an Arrow-Catch Ward

plausible mechanism · popularity 84 · 1 source thread

Kvothe's roah chest survives Bast's axe not through wood hardness but through hidden sygaldry like his arrow catch.

About: The Thrice-Locked Chest, Sygaldry

Also involves: The Lackless Box, Bast, Kvothe, Master Kilvin, The Arrow Catch

The theory§

Kvothe's thrice-locked chest, built of black roah and bound with iron, copper, and a third unseen lock, resists Bast's axe not because the wood is simply too hard but because it carries protective sygaldry akin to the arrow catch Kvothe devised at the University. When Bast strikes the chest it answers with 'a strange, soft, ringing noise, like a padded bell being struck in a distant room' — the same uncanny sound that accompanied the arrow catch when Kilvin tested it, rather than the splintering or solid resistance bare roah would give. The arrow catch works by deflecting incoming force back along the line of attack with equal strength, and a chest warded the same way would turn aside any blow meant to break into it, which would explain why Kvothe — who built the chest himself — trusts it to hold something he never means to be reached by force. The competing reading holds that roah is 'like stone under the saw,' so a sufficiently sharp edge against dense, resonant wood could produce the ringing on its own; but the precise echo of the arrow-catch description argues for hidden craft over mere acoustics.

Evidence§

  • When I read the book before I had always assumed that the roah wood was too strong for the axe but now I realized it was something else.
    OP frames theory: chest's resistance isn't just hard wood but something else.u/ArberTheBarber
  • When bast hits the chest, it says. “There was a strange, soft, ringing noise, like a padded bell being struck in a distant room.”
    Key textual observation: the chest's sound when struck by the axe.u/ArberTheBarber
  • So I then realized that this is the same sound that Kvothe’s arrow catch made when Kilvin tested it. So Kvothe must be using a kind-of arrow catch to protect his chest.
    Core inference: identical sound links chest to the arrow-catch sygaldry.u/ArberTheBarber
  • If the chest has similar sygaldry tech it is somehow re-cocking the springs internally with no loss of energy and some method of deflecting blows on a non horizontal plane
    Refines mechanism: chest must reset springs and deflect off-plane blows.u/Sandal-Hat
  • If this characteristic carries over a bone weapon may be able to chip away at the chest.
    Adds prediction: a bone weapon might bypass the warding like the bloodless.u/Sandal-Hat
  • I suspect the chest contains something like the ward Kilven showed Kvothe, that piece of magic nobody understood.
    Alternative supporting idea: chest holds an unexplained protective ward.u/thecyberbard
  • it could just be that the acoustic characteristics of whatever wood Kvothe used let the chest ring under the impact.
    CounterCounter: the ringing may be plain acoustics, not hidden sygaldry.u/fZAqSD
  • The thing, though is that roah is like stone under the saw. Try a chisel, like iron. … we might expect similar results.
    CounterCounter: dense roah plus a sharp edge could produce ringing alone.u/polymath-potion

Book refs: WMF

Tier reasoning§

tier correct: textual sound-match clue, contested by commenters

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